Nailing machine



1929- H. w. MORGAN 1 5 NAILING MACHINE Filed Au /6, 1928 9 Sheets-Sheet 1 INVENTOR i hty Dec. 24, 1929. w, MQRGAN 1,741,135

NAILING MACHINE Filed .Aug 6, 1928 9 Sheets-Sheet 2 INVENTOR nty 2:5 ATTOR Y Dec. 24,, 1929. H. w. MORGAN 3 v NAILING MACHINE Filed gwas '9 Sheets-Sheet 5 452's ATTORN E fies. 24, 1929.

H. w. MORAN 1,741,135

NAILING MACHINE Filed Aug. 6, 192g 9 Sheets-Sheet 4 Deco mza H. w mmm 1341,1225

MAILING MACHINE Filed Aug. 6. 1.928 9 Sheets-Sheet 5 T? mama; gem 7%. Z710 u Q W %ZIS ATTORN 5 9% 2%, H. w. MQRGAN 3 L NAILING MACH-IRE Filed Aug. 6, 1928 9 Sheets-Sheet 6 ENVENTOR fi e? mam Dec. 24, 1929. H. w. MORGAN 1,741,135

NAILING MACHINE Filed'Aug. 6, 1928 9 Sheets-Sheet 7 INVENTOR W/Vagym 15 ATTOEY Dec. 24, 1929. H. w. MORGAN 1,741,135

MAILING MACHINE Filed Aug. 6. 1928 9 She ets-Sheet 8 INVENTOR (QWM 1 if VizZSATTORNW Dec. 24, 1929. H. w. MORGAN NAILING MACHINE Filed Aug. 6, 1928 9 Sheets-Sheet 9 W' ym l r ATTOR Y5 INVENTOR Patented Dec. 24-, 1929 PATENT OFFICE HENRY W. IEOBGAN', OF ROCHESTER, NEW YORK NAILING MACHINE Application filed August 6, 1928. Serial No. 297,801.

ne present invention relates to nailing machines and has for its object to provide an improved machine of this class for operating on various kinds of work where s veral parts are to be nailed together and being particularly adapted for use in the manufacture of containers or boxes and the like. A further object oi the invention is to provide an improved nail driving machine having automatic compensating means as sociated with the driving mechanism to render the latter self-adjustable in operating on work pieces of diii'erent thickness or varying proportions from time to tune.

A further object of the invention is to provide improved work holding, nail driving and compensating devices with control mechanism therefor properly coordinated to operate in suitable timed relation whereby said devices will perform their several functions in the orderrequired to complete the work in the desired manner.

A further object oi the invention is to provide an improved 1 ing machine making boxes and the like wherein the sides of the boses are successively nailed to the ends and ii-herein when one side is placed opposite a previously nailed side the compensating mechanism will operate automatically Ed in proper timed relation to permit the drivelements to shitt relative to the driving head an amountsubstantially equal to the thickness of the additional side.

To these and other ones the invention 55 resides in certain improvements and conbinatious of parts all as will be hereinafter more fully described, the novel features being; pointed out in the claims at the end of the specification.

In the drawings:

Fig. 1 is a front elevation of a machine embodying one form of the invention with the nailing mechanism shown in engagement with the work;

Fig. 2 is a similar view with the nailing mechanism raised to clear the work;

Fig. 3 is an end elevation of the machine shown in Fig. 1, with the cross head in lowered position;

Fig. 4 is a similar end elevation with the cross head in the raised position corresponding to that shown in Fig. 2;

Fig. 5 is an enlarged fragmentary sectional elevation illustrating the compensating mechanism for regulating the position of the driving plungers relative to the cross head;

Fig. 6 is a somewhat similar view with the parts adjusted to a position permitting movement of the plunger-s relative to the cross head to compensate for the difference in the thicknesses of the work pieces operated upon;

Fig. 7 is a detail sectional elevation taken substantially on line T'? of Fig. 5;

Fig. 8 is a fragmentary part sectional elevation of a portion of the cross head in its uppermost position showing one of the compensating cam and ratchetmechanisins carried thereby;

Fig. 9 is a similar view showing said parts in lowered position corresponding to that shown in Fig. 1;

Fig. 10 is a detailed perspective view of the lower ustable bar of the compensating mechanism for engaging and operating the driving plungers carried by the cross head;

F 11 is a partsectional plan of the work holding means shown in operating position;

Fig. 12 is a similar view with the holding parts in released position;

Fig. 13 is a front elevation of the work holding device shown at the left of Fig. 11 including one of the nailing chucks and the guard means for the left hand end of the box;

Fig. 1% is a sectional elevation taken on the line 14e 1 l of Fig. 11; and

Figs, 15 and 16 are diagramamtic views, illustrating the relative positions of the nail drivers at the ends of their downward strokes when operating on work pieces of different thickness.

Similar reference numerals throughout the several views indicate the same parts.

The present nailing machine comprises generally a frame or base on which is disposed a work support and a reciprocally mounted power driven cross head carrying a plurality of nail chucks or guiding devices having nail delivering tubes leading thereto and with nail driving plungers operating therein and actuated by the cross head to drive the nails into the work. The work may vary in character within a relatively wide range but as illustrative of one example of the usefullness of the machine, I have illustrated its operation in connection with a box or container which, as shown, is similar in construction to an orange box but which may differ therefrom, as will be readily understood. Broadly, the machine may be employed for nailing together parts of varying shapes differing in cross section, such as strips, bars or plate-like members whether of varying or equal thickness.

In the present design automatic worl clamping devices are provided which are preferably under the control of the cross head and which are released as the latter moves upwardly and shifted to work engaging position on the initial downward movement of the cross head.

The nail driving chucks are also under the control of the cross head and are slightly raised by the latter to disengage the work after each driving operation, following which the cross head is moved upwardly to its extreme position. The chucks are preferably moved by gravity into engagement with the work when the cross head is lowered.

Suitable nail feeding mechanism of a well known type is provided for delivering the nails to the guide tubes leading to the chucks as illustrated in Figs. 1 and 2.

A compensating device is provided for each set of nail c riving plungers which, in a given cycle of nailing operations, effects one or more adjustments of parts which permit the plungers to shift vertically and relative to the cross head to compensate for the difference in thickness of the work pieces operated upon during the cycle, it being understood that in each operation the stroke of the cross head is the same.

The cross head is raised and lowered by suitable power means such as an electric motor and the operating devices actuated by the cross head for controlling or effecting automatic movement of the nail guiding chucks,

together with the work holding means, and the compensating mechanisms are so timed as to perform their functions at the proper moment in accordance with a predetermined plan which may be varied to meet different conditions from time to time.

Referring to the drawings, 10 represents a vertical frame provided with side rails'll upon which across head 12 is reciprocally mounted, the cross head constituting the operating means for the nail driving mechanism, as will appear hereinafter. A work support or table 13 is carried by the frame beneath the cross head. An electric motor 14;, supported by the frame, preferably constitutes the power means for operating the cross head and other parts of the machine. The motor is suitably connected with a power shaft 15 having a pinion 16 adjacent each end. A relatively large gear 17 is driven by each pinion and a pitman 18 is connected with each gear by a crank pin 19. The upper end of each pitman is pivotally connected with the cross head by a pin 20. By this means the cross head is moved up and down to operate various parts hereinafter described.

As indicated in Figs. 1 and 2, the frame carries two inclined nail holding receptacles 21 which are arranged to be oscillated through suitable connections driven by the motor, the receptacles having the usual slots or ways through which nails are discharged to the uide slots of the inclined plates 22. Any suitable or well known nail distributing device such as that which is indicated generally at 23 may be provided to receive the nails from the inclined guide plates and to distribute them to the guide tubes 24 which lead downwardly into the nail chucks 25 which engage the work during the nailing operations. The chucks may be of any suitable design adapted for positioning the nails in the path of the driving plungers or elements 26 which project into the chucks and which are operated by the cross head in ,a manner hereinafter described.

In the present instance, the particular form of work shown by way of illustration constitutes a box of the kind used for shipping oranges or other fruits, but which may be used for various purposes, and the construction of which may be varied as desired. The present box or container comprises generally the end sections A and B and an intermediate section G which are positioned upon the work support and clamped in the position shown in Fig. 11 by suitable holding means hereinafter described. The three sides of the box which, constitute the sections to be nailed to the ends and intermediate section are indicated generally by the letters D, E and F and which are applied in the order named. For example, in Fig. 15, the first section D is shown in the position it occupies upon the upper edges of the end and intermediate sections, in which case the driving elements or plungers 26 are shown in their lowest position with the chucks omitted. After the nailing operation for the section D has been completed, the cross head and the chucks are raised to clear the work, as shown in Fig. 2. The operator then withdraws the work, turning the same through an angle of 90, preferably in a counter-clockwise direction, assuming that he occupies a position at the left of Fig. 15. The work is then repositioned upon the support for the reception of the section E. When the nailing'operation for this section is completed the nailing elements 26 will occupy the same position as shown in Fig. 15. The work is again turned in the same direction through an angle of 90 and repositioned for the reception of the section F. In this position section D will rest upon the table 13, thus increasing the overall depth of the work by the thickness of the section F. To take care of this difference in thickness or depth of the work, the compensating means, on the third operation, will function to permit the nail driving elements 26 to be moved upwardly, through engagement ith the nails for securing section F, a distance equal to the thickness of said section, the relative position of said nail driving elements in this case being indicated in Fig. 16 in which they are Sl\ n at their lowermost nailing position.

At this point it may be stated that the cam for controlling the compensating mechanism is so designed as to take care of the nailing operations on two boxes for each revolution 2a of the cam. In other words, for the first two nailing operations, although the cam is rotated, the compensating mechanism remains inactive. For the third operation it is adjusted by the cam to permit the driving elements to move up to the position shown in Figs. 6 and 16. In advance of the fourth nailing operation, the compensating mechanism is readjusted by the cam to the original starting position so that the fourth and fifth operations are the same as the first and seconc, while the sixth operation will be the same as the third, the cam at this time having completed one revolution as stated above. This cycle of operations may, of course, be varied as desired by changing the cam according to the nature of the work to be operated on from time to time.

In the present embodiment of the invention three sets of chucks are shown, the two end sets each havin live chucks and the intermediate set having four, all of which are moved i .to engagement with he work simultaneously following which the plungers 26 are operated todrive the nails by the clownward stroke of the cross head. The cross head 12 carries three similarly constructed frames or side arms 2?, as shown in Figs. 1 and 2. The rear face of each side arm is seated upon suitable upper and lower bearing portions 28 and 29 of the cross head, as shown in Fig. 5. Bearing portion 29 has an undercut longitudinally extending groove 30 for receiving the heads 31 of bolts 32 which serve to secure the side arms in any position of adjustment desired upon the cross head depending on the spacings of the box sections A, B and C or other parts to be nailed. The side arms have lugs 33 thereon which project into the groove of the bearing 29 as shown in 5, whereby to relieve the strain on the bolts 32. The lower forwardly extending portion 34. of the side arm has bolted thereto a gib 35 to form with said portion a guide way for receiving the upper and lower compensating bars 36 and 37, respectively. The

upper bar is preferably made T shaped and is supported for longitudinal movement in the guideway by mounting the projecting portions 38 thereof within grooves 39 formed in the portions 3-1 and 35 of the side arms as best shown in Fig. 7. The lower bar 37 rests upon the heads 26 of the nail driving plungers 26 in all positions thereof. The lower bar is guided in its up and down movement by the parts 3a and 35 of the side arm and is prevented from shifting longitudinally by a pin 40 having its upper end secured to the front end of the side arm by a stud 4:1 and its lower end projecting into an opening 42 in the outer end of said bar which is free to slide on the pin. The heads 26 of the nailing plungers rest upon the inwardly projecting parts 3% and 35 of the side arm portions 3% and 35, as shown in 7. The upper compensating bar is provided at its lower side with a plurality of downwardly projecting lugs 36 arranged to rest on corresponding upwardly projecting lugs 37 on the lower bar 37 when the parts are in the posit-ion shown in r ig. 5, at which position said parts are held when the sections D and E are nailed to the sections A, B and C of the box. N otches are formed between the lugs of each bar and the opposite faces of the lugs are inclined to form cams, as shown, which cooperate to insure downward movement of the lower bar under all conditions of operation when the upper bar is being moved from the position shown in Fig. i to that shown in Fig. 5. In other words, the cams of the upper bar will engage those of the lower bar to positively move the latter downwardly should it for any reason fail to drop by gravity as intended, when the cross head is raised to raise the driving plungers from their lowermost driving position.

The means for effecting reciprocation of the upper compensating bar at the required time is preferably in the form of a cam 43 operated step by step at each upward movement of the cross head through an angle of 60 so that at the end of the sixth nailing operation, which is the last operation on the second box, the cam will have made a complete revolution. The cam operates between two rollers 44 carried on the inner end of the compensating bar 36, as shown in Figs. 5 and 6. The cam is loosely mounted on the hub or hearing portion of a ratchet wheel 43 which is keyed on a crank shaft 45 journalled in :1 depending portion 46 of the side arm 27 and has on its rear end a crank arm d7 carrying at its outer end a roller 48. The roller is arran ed to travel between two guide rails 49 extending longitudinally below the cross head and having their ends suitably secured to the opposite side rails 11 of the main frame 10, as shown at the left of Figs. 1 and 2. The cam is provided with a pin 50 spaced from and paralleling its axis which forms a pivotal The two high points is provided on its periphery with six notches indicated at 56, arranged 60 apart, so that the space between each pair of notches corresponds to one-sixth of a revolution of the cam. A spring 57 is secured to the side arm 27 and has an angular portion 58 arranged to engage in the notches 56 to prevent accidental reverse rotation of the cam when the cross head is moved up from its lowermost position. The stroke of the cross head is somewhat greater than thethrow of the cam to afford a certain amount of lost motion between the pawl and the teeth of the ratchet wheel as indicated in Fig. 9, which is desirable in an arrangement of this kind. The number of teeth of the ratchet wheel corresponds to the number of notches in the cam, and for each downward stroke of the cross head the crank will advance the ratchet wheel a distance somewhat greater than that between the teeth of the wheel to afiord the lost motion indicated in Fig. 9. On the upward movement of the cross head when the ratchet tooth comes into engagement with the pawl, the latter will begin to rotate the cam and by the time the upward stroke is completed, the pawl will have moved the cam one-sixth of a revolution, following which the spring 57 will engage in one of the notches 56 of the cam to prevent reverse movement of the latter until the cross head is again moved downwardly. of the cam are indicated generally at 59 and 60 and it is when these are moved between the rollers 14 that the compensating bar 36 is moved from the position shown in Fig. to that shown in Fig. 6. On the next succeeding operation of the cam and when moving from the high to the low position, the compensating bar 36 is returned from the position shown in Fig. 6 to that shown in Fig. 5.

The chucks have oppositely disposed connecting passages for the reception of the nail delivery tubes 24, so that some of the tubes may enter the chucks on one side of the arm 37 while others are arranged to enter from the opposite side, as shown in Figs. 1 and 2.

The supporting means for the chucks comprises a reciprocally mounted bar 61 extending from one side rail 11 to another and being suitably connected therewith for a sliding movement thereon to raise and lower the chucks upon reciprocation of the cross head and by means hereinafter described. The bar has an undercut groove 62 extending its full length which is adapted to receive the clamp ing bolts 63 of a bracket 6 1 provided for each set of chucks. Each bracket is adjustable longitudinally of the bar to bring the chucks into proper alignment with the nail driving or actuating bars 36 and 37. Suitably connected with each bracket is a pair of forwardiy extending upper and lower arms 65 and 66 which are spaced apart and connected at their front ends by a plate 67, Fig. 14:. Each chuck casting is provided intermediate its ends at one side with a lug 25 which pr0- jects between the arms and is threaded to receive a clamping screw 68 by which the chuck is held in adjusted position upon the arms, a washer 69 being used under the head of the screw to engage both arms as shown in Fi 13. The plate 6? connecting the outer ends of the arms carries upstanding guard 70 disposed in front of the side arms 27, whereby the operator is prevented from being struck by the downward movement of the latter.

The bar 61 carries a pair of stops for limiting the rearward movement of the box sections D, E and F when they are inserted upon the end sections to be nailed thereto. The stops comprise vertically disposed plates 71 secured to the bar 61 by bolts 7 2 having heads disposed in the undercut groove 62 of the bar. At their lower ends the plates are provided with adjustable screws 73 which carry on their front ends suitable stops 7 1 as shown in Fig. 14. The screws may be adjusted to position the steps so that the sides of the box will be properly lined up with respect to the ends to which they are to be nailed.

The chuck holding bar is raised and lowered by means of the cross head through the employment of a pair of arms 7 5 at the opposite ends of the cross head which are pivoted at 76 to the frame rails 11 and which have formed in their upper ends cam grooves 7'? into which project rollers 7 8 free to rotate on studs 79 adjustably held by set screws 80 in bearings 81 on the ends of the cross head, as indicated in Fig. 2. The arms 7 5 have forwardly projecting lugs 82 in which are slidably mounted rods 83 having their lower ends pivoted at 84 to upstanding lugs 85 on the ends of the chuck carrying bar 61 which as above stated is slidably secured to the end rails 11 of the frame 10 in a suitable manner. Upon moving the cross head downwardly from its uppermost position, the rollers 7 8 traveling in the cam grooves 77 of the arms will swing the latter forwardly and clownwardly from the position shown in Fig. 4 to that shown in Fig. 3. Consequently the lugs 82 of the arm are lowered and the chuck holding bar with the chucks thereon will at this time descend by gravity until the chucks move into engagement with the work. During the continued downward movement of the cross head the rollers 78 will travel in the dwell portions of the cam groove 77 until they reach the position shown in Fig. 3, at which position the nail driving plungers 26 will be at the end of their downward stroke.

Separate holding devices are provided for each of the box sections A, B and C, as shown in Figs. 11 and 12. These devices are each supported by a rail 86, as indicated in Fig. 14, having its opposite ends suitably secured to the upright frame rails 11. Adjustably clamped upon the rail are three brackets, two of which indicated at 87 are similarly constructed, and the third designated by the numeral 88 being of slightly different construction. The brackets are preferably of cast construction and are held in the desired position of adjustment by a pair of gibs 89 secured by screw bolts 90, as best shown in Fig. 11. The brackets 87 have vertically disposed bearing faces 87 which form stops for the box sections A, and C, as shown in Figs. 11, 12 and L1.- Eaeh bracket 87 is provided with a pair of forwardly projecting arms 91 and 2. The arms 91 carry upstanding plates 93 to which are suitably attached forwardly projecting holding and guiding members 94 and 95 for the box sections A and C, the guide 91- serving to engage the intermediate box sections C and the guide 95 engaging the section A. The guide 95 carries a narrow extension strip 96 which engages the end section A of the box at a relatively low point, as

I shown in Fig. 13.

An additional holding guide is provided for the upper front portion of the section A, the construction of which is best shown in Fig. 14. This holder comprises a plate 97 depending from and suitably connected with the ends of the left hand pair of chuck holding arms 65 and 66. The plate 97 carries a rearwardly extending portion 98 to which is secured a relatively thin guide plate 97 bent outwardly at its front edge and arranged to engage the outer face of the box section A to hold and guide the section when positioned upon the work support. The guide or holding pTate, is moved up and down With the chuck arms to which it is attached in the rise and fall of the chuck holding bar 61. The arms 92 of the brackets 87 carrying clamping wings or elements 100 provided with upper and lower lugs 101 arranged to straddle a portion of the arm 92 and being free to slide thereon and to swing to and from the positions shown in Figs. 11 and 12. The arm 92 has pivoted thereon at 102 a clamping lever 102, the forward arm of which has a pin 103 loosely projecting therethrough, one end of which extends between upper and lower lugs 104 on the clamping element 100 and is connected therewith by a pivot pin 105. A spring 106 is interposed between the lugs and the lever arm for yieldably holding the clamping element in engagement with the box sections A and C when the parts are in the position shown in Fig. 11. The pin 103 also serves as a support for the outer end 'of the clamping element, the inner end of which is directly supported by the arm 92. The lever carries a roller 107 engaging a cam 108 on a cam shaft 108 journalled in bearings 109 on the upper faces of the brackets 87 and 88. The bearings 109 carry upstanding lugs 109 in which are slidably mounted pins 110, the forward ends of which project into recessed lugs 111 on the levers 102. Springs 112 are carried by the pins 110 and serve to urge them forwardly whereby the rollers 107 of the levers 102 are yieldingly held in engagement with the cams 108. Since the clamping parts for the left hand side of section B are the same as those for the right hand side of sections A and C, except for being reversed, they have been given the same reference characters. Likewise, the arm on bracket 88 for supporting said parts has been given the reference character 92 designating the similar arms on the brackets 87.

The bracket 88 carries an outside arm 113 on which is pivotally mounted at 11 1 a lever 11-51 having a roller 115 engaging a cam 116 on the cam shaft 108 which is operated by the cross head in a manner hereinafter described. The clamping wing or element 1 7 for engaging the outer face of section B of the box is connected at its rear end with the arm 113 by a l nk 118. The clamping element- 117 carries a bracket 119 which is pivotally connected at 120 with the lever 11 -1. The right hand lug 109 of the bracket 88 carries a. pin 110, the front cm of which projects into the recess of a lu 121 on the lever 11a, the pin carrying a spring 112 by which the roller 115 is urged into engagement with the cam 116. The clamping element 117 carries adjacent its bottom edge an extended clamping strip 122 which engages the end section B of the box adjacent its front edge as shown in Fig. 3.

Upon rotating the cam shaft from the position shown in Figs. 3 and 11 to that shown in Figs. a and 12, the springs 112 will swing the levers 102 and 111 to the right and the pins 103 on the forward arms of the levers will move the clamping elements 100 and 117 to the position shown in F ig. 12 whereby the box sections A, B and C will be released for withdrawal from the holding means. The link 113 is provided in order to permit the clamping element 117 to be swung clear of the box section B whereby to insure easy insertion and removal of the same. The springs 106 serve to yieldably urge the clampin elements 100 in engagement with the box sections A, B and C and permit them to shift on the arms 92 and relative to the levers 102 whereby to adapt themselves to work pieces of different thickness.

The operating means for the cam shaft comprises a crank arm 123 rigidly connected with the shaft and to which is pivoted at 12 1 a link 125, the upper end of which is pivotally connected at 126 to a bracket 127 suitably secured to the back of the cross head, as indicated by dotted lines in Figs. 3 and 4:, showing the cross head in its extreme positions.

In moving the cross head upwardly, the link 125 will raise the crank arm 123 from the position shown in Fig. 3 to that shown in Fig. 4:, -hus rocking the cam shaft to swing the high points of the cams out of engagement with the rollers 107, at which time the springs 112 will rock the levers 102 and 11 1 which in turn. serve'to swing the clampelements 100 and 117 to the release position shown in Fig. 12. -While the clampmember 11. is mounted to swing as described, it serves to form a rigid stop for the box section 13 when in the position shown in Fig. 11. And since the distance between stops 95 and 117 remains fixed, the overall length of the boxes will be the same and any variation in the thickness of the sections A, B and C will be taken care of by the floating and yieldably supported clamping elements 100.

In the operation of the cross head, an automatic clutch, not shown, operates to disconnect the driving mechanism for the power shaft 13 after the clutch head has been moved downwardly from and returned to theposition shown in Fig. 1. The clutch is under the control of the operator and may be moved to driving position by a foot pedal or other means not shown. In moving the cross head downwardly, it performs three different functions, namely, that of moving the link 125 to operate the cam shaft whereby the work clamping devices are operated; that f permitting the chuck carrying support to drop by gravity so that the chucks will engage the work; and that of moving the plungers 26 downwardly within the chucks to drive the nails. The cross head also serves on its downward stroke to advance the ratchet wheel one step so that the pawl will engage in a different notch therein each time the cross head descends to driving position, whereby pon upward movement of the cross head the compensating cam will be rotated by the ratchet and crank a distance equal to one-sixth of a revolution, as stated above in connection with the operation of the compensating mechanism,

I claim as my invention:

1. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with said guiding devices, and operating means for the driving elements including a plurality of parts adapted in a given cycle of operations to be automatically shifted to and from a predetermined relationship whereby to vary the position of the driving elements to compensate for work pieces of different thicknesses.

2. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with said guiding devices, operating means for the driving elements including a a shiftable part engaging the driving elements, an adjustable part for regulating the position of the shiftable part, and means by which the adjustable part is moved from one regulating position to another whereby to vary the position of the driving elements to compensate for work pieces of different thicknesses.

3. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with said guidin devices, operating means for the driving elements comprising a reciprocally mounted head arranged to support the driving elements, an actuating part engaging the driving elements and being mounted to shift upon the head topermit the driving elements to shift relative to the head, an adjustable part for regulating the position of the actuating part, means for operating the head, and means controlled by the head arranged to automatically move the adjustable part to and from adjusted position for different strokes of the head.

4. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, driving means for said elements including parts adjustable to permit the driving elements to shift from one position to another, and means adapted in one of a predetermined number of operations of the machine to automatically adjust said parts'whereby to compensate for work pieces of different thicknesses.

5. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, driving means for said elements including parts adjustable to permit the driving elements to shift from one position to another whereby to compen sate for work pieces of different thicknesses, and means arranged to be operated by th driving means to automatically effect adjustment of said parts subsequent to a predetermined number of driving operations.

6. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, driving means for said elements including parts adjustable to permit the driving elements to shift from one position to another whereby to compensate for work pieces of diflerent thicknesses, and means including a cam and ratchet mechanism for automatically effecting adjustment of said parts during one of a predetermined number of dri ing operations.

7. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, driving mechanism for said elements, and adjustable compensating mechanism associated with the driving mechanism arranged to be automatically operated thereby to effect a variation in the position of the driving elements relative to the driving mechanism subsequent to a predetermined number of driving operations whereby to compensate for work pieces of different thicknesses.

8. In a nailing machine, a frame, a work support, nail driving mechanism comprising a reciprocally mounted head having one or more driving elements adapted for movement thereon, relatively movable devices on the head, one of which is adjustable to permit free vertical movement of the other to allow said driving elements to move relative to the head whereby to effect driving of the nails in work pieces of different thicknesses, means actuated by the head during one of a predetermined number of strokes thereof to operate said adjustable device, and means for reciprocating the head.

9. In a nailing machine, a frame, a work support, nail driving mechanism carried by the frame comprising one or more nail driving elements, operating parts for said elements, one of which is adjustable to permit said elements to shift relative thereto whereby to compensate for variation in the thickness of different work pieces to be operated upon, means for operating said parts to effect driving of the nails, and means associated with the operating means arranged to shift said adjustable part subsequent to a predetermined number of driving operations.

10. In a nailing machine, a frame, a work support, nail driving mechanism carried by the frame comprising relatively movable parts for driving the nails, one of which is arranged for adjustment to and from difierent driving positions to permit the nail engaging parts to be shifted by the work in advance of the driving operations whereby to compensate for a variation in the thickness of the diflerent work pieces to be operated upon, operating means for moving said parts to effect driving of the nails, and means for periodically shifting said adjustable part to said different positions, said means comprising relatively movable devices interposed between the frame and said operating means and controlled by the latter.

11. In a nailing machine, a frame, a work support, nail driving mechanism carried by the frame comprising a head reciprocally mounted thereon, one or more nail driving elements carried by the head, a pair of adj ustable actuating parts for said elements mounted upon the head, one of which is shiftable to occupy difierent operating positions with respect to the other, the latter being moved from one position of adjustment to another through engagement of the driving elements with the work when the shiftable part is in one operating position and during movement of the head toward the work, operating means for the head, and means under the control of the head for periodically moving said shiftable part to and from said different positions.

12. In a nailing machine, a frame, a work support thereon, nail driving mechanism comprising a head reciprocally mounted upon the frame, one or more driving elements movable on the head to compensate for work pieces of different thickness held by the support, means adjustable upon the head to permit the driving elements to shift relative thereto, means controlled by the head for periodically actuating said adjustable means, and operating means for the head.

13. In a nailing machine, a frame, a work support thereon, nail driving mechanism carried by the frame comprising relatively adjustable actuating devices, one or more nail driving elements associated with said devices arranged for a shifting movement by a work piece of a predetermined thickness upon effecting relative adjustment between said actuating devices, operating means for moving said actuating devices to effect operation of said nail driving elements, and means associated with the operating means arranged to automatically effect relative adjustment between said actuating devices to permit said driving elements to be shifted by said work piece.

14. In a nailing machine, a frame, a work support, a driving head mounted for movement to and from driving position upon the frame, a nail guiding device mounted for movement upon the frame to and from work engaging position, a nail driving element operable within said guiding device and being shift-able from one position of adjustment to another upon the head, means adapted after a predetermined number of operations of the head to be conditioned thereby to permit the driving element to shift from one of said positions to another, means adapted to be actuated by the head to move the nail guiding device from engagement with the work upon movement of the head in one direction, and operating means for the head.

15. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, a reciprocally mounted driving head for supporting said driving elements relative to which the driving elements are arranged to shift "ertically from one operating position to another, adjustable means interposed between the upper ends of the driving elements and the head adapted when adjusted to a predetermined position to free the driving elements for vertical movement between said driving positions, means for reciprocating the head, and means controlled by the head for effecting operation of the adjustable means for one or more of a given cycle of operations of the head.

16. In a nailing machine, a frame, a work support, a head reciprocally mounted on the frame, a plurality of work engaging nail guiding devices, a plurality of nail driving elements depending from the head and projecting within the guiding devices, a horizontally disposed operating member for the nail driving elements guided by the head for vertical adjustment to different operating positions, a second member adjustable upon the head to different operating positions whereby to permit the operating member to shift from one operating plane to another, means for reciprocating. the head, and means controlled by the head adapted to move said second member to its different operating positions during a predetermined cycle of operations of the head.

17. In a nailing machine, a frame, a work support, a driving head reciprocally mounted on the frame, a plurality of nail guiding devices, a plurality of nail driving elements depending from the head, upper and lower cooperating cam bars on the head, one of which is guided for longitudinal adjustment to different positions and the other for vertical adjustment upon the head, the former to regulate the position of the latter, said lower member being arranged to engage the upper ends of the driving elements in its different positions of adjustment to effect operation of said driving elements, means for reciprocating the head, and means for automatically moving said longitudinally adjustable cam bar to and from its different positions during operation of the head.

18. In a nailing machine, a frame, a work support, nail guiding devices carried by the frame, a head reciprocally mounted upon the frame, said driving elements adjustable vertically upon the head and arranged to project into the guiding devices, relatively movable actuating devices for the driving elements adjustable to different positions to permit the driving elements to shift vertically upon the head to compensate for work pieces of different thickness to be operated on, a crank mountedto oscillate upon the head including an arm having a roller thereon, guides for the roller carried by the frame, a ratchet wheel rigidly connected With the crank, a cam rotatable about the axis of the ratchet wheel, an operating pawl for the cam pivoted thereon and arranged to be actuated by the ratchet'wheel to drive the cam step by step in one direction upon reciprocation of the cross head, rollers carried by one of said actuating devices between which the cam is adapted to travel whereby to effect relative adjustment between said devices, said cam being designed to shift the actuating device during certain predetermined steps in its advancing operations and being inoperative relative thereto for the remaining advancing operations, and means for reciprocating the head.

19. In a nailing machine, a frame, a work support, a driving head reciprocally mounted on the frame, a nail guiding device, holding means for said device reciprocally mounted on the frame, an adjustable nail driving element associated with said guiding device adapted to be driven by the head, adjustable devices interposed between the head and driving element to permit the latter to shift relative to the head, operating means for said devices adapted to be actuated subsequent to a predetermined number of driving operations, operating means for the holding means actuated by the head,'and means for reciprocating the head.

20. In a nailing machine, a frame, a work support, a driving head reciprocally mounted on the frame, a nail guiding device, holding means for said device reciprocally mounted on the frame, a nail driving element associated with said guiding device and being shiftable vertically from one position of adjustment to another upon the head, means adapted after a predetermined number of operations of the head to be conditioned thereby to permit the driving element to shift from one of said positions to another, means actuated by the head for operating the holding means, and means for reciprocating the head.

21. In a nailing machine, a frame, a work support, a driving head mounted for movement to and from driving position upon the frame, a nail guiding device upon the frame, a nail driving element associated with the guiding device and being shiftable from one position to another upon the head to compensate for work parts of different thicknesses, adjustable means upon the head by which said driving element is both operated and freed for adjustment to one of said positions, means arranged to be operated by the head to effect adjustment of said means subsequent to a predetermined number of operations of the head. adjustable holding means for the work, means adapted to be operated by the head to move said holding means to and from work holding position, and operating means for the head. j

22. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with said guiding devices, operating means for the driving elements including a plurality of parts adapted in a given cycle of operations to be automatically shifted to and from a predetermined relationship whereby to vary the position of the driving elements to compensate for work pieces of dilferent thickness, and work holding means movable to and from engagement with the work adapted to be actuated by said operating means.

23. In a nailing machine, a frame, a work support, a plurality of work engaging nail guidin devices, nail driving elements associated with said guiding devices. operating means for the driving elements including a plurality of parts adapted in a given cycle of operations to be automatically shifted to and from a predetermined relationship whereby to vary the position of the driving ele nent-s to compensate for work pieces of different thicknesses, and means for loving the guiding devices from engagement with the work adapt-ed to be actuated by the operating means.

24. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with said guiding devices, operating means for the driving elements including a shiftable part engaging the driving elements, an adjustable part for regulating the position of the shiftable part, means by which the adjustable part is moved from one regulating position to another whereby to vary the position of the driving elements to compensate for work pieces of different thicknesses, and means for moving the nail guiding devices from engagement with the work arranged to be actuated by the operating means.

25. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices. nail driving elements associated with said guiding devices, operating means for the driving elements including a shiftable part engaging the driving elements, an adjustable part for regulating the position of the shiftable part, means by which the adjustable part is moved from one regulating position to another whereby to vary the position of the driving elements to compensate for work pieces of different thicknesses, and automatic work holding means to engage the work, adapted to be actuated by said operating means.

26. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, driving means for said elements including a part ad justable to permit the driving elements to shift from one position to another, means adapted in one of a predetermined number of operations of the machine to automatically adjust said part whereby to compensate for work pieces of different thicknesses, work clam; ing devices arranged to swing to and from engagement with the work, and means actuated by the driving means for operating said work clamping devices.

27. In a nailing machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, driving means for said elements comprising a reciprocally mounted head having parts adjustable thereon to permit the driving elements to shift from one operating position to another, means adapted in one of a predetermined number of operations of the head to automatically adjust said parts whereby to compensate for work pieces of different thicknesses, and means for moving the nail guiding devices from engagement with the work adapted to be actuated by the head.

28. In a nail driving machine, a frame, a work support, a plurality of work engaging nail guiding devices, nail driving elements associated with the guiding devices, driving means for said elements including parts ad justable to permit the driving elements to shift from one operating position to another. means adapted in one of a predetermined number of operations of the machine to automatically adjust said parts whereby to compensate for work pieces of different thicknesses, clamping devices arranged to swing to and from engagement with the work adapted to be actuated by the driving means. and means arranged to be actuated by the driving means for moving the guiding devices from engagement with the work.

29. In a nailing machine, a frame. a work support thereon, nail driving mechanism comprising a head reciprocally mounted upon the frame, one or more driving elements movable on the head to compensate for work pieces of different thicknesses held by the support, means adjustable upon the head to permit the driving elements to shift relative thereto, means controlled by the head for periodically actuating said adjustable means, operating means for the head, and work clamping mem bers arranged to swing to and from engagement with the work adapted to be actuated by the head.

30. In a nailing machine. a frame. a work support thereon, nail driving mechanism comprising a head reciprocally mounted upon the frame, one or more driving elements movable to different operating positions upon the head to compensate for work pieces of different thicknesses held by the support, means adjustable upon the head to nermit the drivi 11g elements to shift relative thereto, means controlled by the head for periodically actuating said adjustable means, operating means for the head, nail guiding devices arranged to engage the work, means for moving the guiding devices from engagement with the work arranged to be actuated by the head, and adjustable clamping means for the work. adapted to be actuated by the head.-

31. In a nailing machine, a frame, a work support, a driving head reciprocally mounted upon the frame, a plurality of nail driving elements, relatively movable operating parts for said elements arranged to be actuated by the head, means arranged to operate periodically to effect relative adjustment between said members to permit the driving elements to shift relative thereto whereby to compensate for work pieces of varying thicknesses, and means for reciprocating the head.

32. In a nail driving machine, a work support, a nail engaging and driving element,

7 means for guiding the nails to be' driven by said element, and driving mechanism for said element operating periodically to permit said element to be shifted relative to said mechanism whereby to compensate for work pieces of different thicknesses in which the nails are to be driven.

33. In a nail driving machine, a work support, a nail engaging and driving element, driving mechanism for said element including relatively movable parts, means for actuating said parts, and means operating periodically to adjust one of said parts to permit said driving element to be shifted relatively to said parts by the work in advance of the driving operation whereby to compensate for work pieces of difierent thicknesses.

34. In a nailing machine, a work support, a plurality of nail positioning devices, driving elements for the nails positioned by said devices, and operating means for said driving elements including a part arranged in a given cycle of operations of the machine to be automatically moved relative to the driving elements, whereby to permit of a variation in the position of said elements to compensate for work pieces of different thicknesses.

HENRY WV. MORGAN. 

